<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        #l1 {color: green}
        .c1 {color: blue}
        h1,h2 {background-color: yellow}
        input[type='password'] {background-color: red}
        * {border: 1px solid red}
    </style>
</head>
<body>
<ul>
    <li id="l1">张学友</li>
    <li class="c1">刘德华</li>
    <li>郭富城</li>
</ul>

<h1 class="c1">悟空</h1>
<h1>八戒</h1>
<h1>沙僧</h1>
<h2>刘备</h2>

<input type="text">
<input type="password">
</body>
</html>